CN117907109A - Self-adaptive circumferential mechanical loading system - Google Patents
Self-adaptive circumferential mechanical loading system Download PDFInfo
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- CN117907109A CN117907109A CN202311829446.0A CN202311829446A CN117907109A CN 117907109 A CN117907109 A CN 117907109A CN 202311829446 A CN202311829446 A CN 202311829446A CN 117907109 A CN117907109 A CN 117907109A
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- 230000000712 assembly Effects 0.000 claims description 5
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- 230000003044 adaptive effect Effects 0.000 claims 9
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
The invention relates to a self-adaptive circumferential mechanical loading system which comprises a first counterforce frame and a second counterforce frame, wherein the first counterforce frame and the second counterforce frame are annular, and a plurality of loading components are arranged between the first counterforce frame and the second counterforce frame.
Description
Technical Field
The invention relates to the technical field of civil engineering test equipment, in particular to a self-adaptive circumferential mechanical loading system.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the increasing number, length, width, speed and density of tunnels, the risk of accidents in tunnels is also increasing. The method is important to the tunnel design and engineering safety by evaluating the bearing capacity of the tunnel structure and revealing the true corresponding rule of the tunnel structure in the catastrophe environment. Through model test, a counterforce loading system is designed to simulate the stress of the tunnel structure, and the method is widely applied to researches on stability analysis of surrounding rock, catastrophe response rules and the like.
Patent CN113008685B discloses a loading position adjustable multi-point loading self-balancing counter-force system, the method of implementing the same can solve the problem that the counter-force loading system in the prior art can not realize loading position adjustment and system self-balancing, and realize self-adaptive circumferential mechanical loading, but the inventor finds that in the technical scheme of the above patent, the distance of a distribution beam is adjusted through an electric push rod, then the hydraulic cylinder is utilized to carry out loading, a locking component drives a rigid wedge block to be embedded into a groove of a fixed rod through a second telescopic rod so as to lock after the distance adjustment, in this way, when receiving a larger load, the rigid wedge block returns to generate micro deformation, and is locked by engagement, so that the follow-up test is affected, and an angle adjusting mechanism is arranged between two counter-force frames, and adopts an electric telescopic rod to carry out angle adjustment.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a self-adaptive circumferential force loading system, overcomes the defects existing in the existing self-adaptive counter-force loading system and has strong applicability.
In order to achieve the above object, the present invention is realized by the following technical scheme:
The embodiment of the invention provides a self-adaptive circumferential mechanical loading system, which comprises a first counterforce frame and a second counterforce frame, wherein the first counterforce frame and the second counterforce frame are annular, a plurality of loading components are arranged between the first counterforce frame and the second counterforce frame, each loading component comprises a loading hydraulic cylinder, a cylinder body of each loading hydraulic cylinder is connected with a rotating shaft, a piston rod of each loading hydraulic cylinder is connected with a distribution Liang Moxiang, the rotating shaft is rotationally connected with the first counterforce frame and the second counterforce frame, one end of the rotating shaft extends out of the first counterforce frame and is connected with an angle adjusting mechanism arranged on the outer side surface of the first counterforce frame, and a clamping mechanism is arranged on the outer side surface of the second counterforce frame to clamp and fix the other end of the rotating shaft.
Optionally, the angle adjustment mechanism includes the connecting rod, and the pivot is fixed with the one end of connecting rod, and the other end of connecting rod is articulated with the piston rod of angle adjustment pneumatic cylinder, and the cylinder body of angle adjustment pneumatic cylinder is articulated with the fixing base, and the fixing base is fixed at first reaction frame lateral surface.
Optionally, an inclination sensor is mounted on the connecting rod to detect the rotation angle thereof.
Optionally, the clamp holding mechanism comprises a first support and a second support which are oppositely arranged, the first support and the second support are fixed on the outer side face of the second reaction frame, the first support is fixed with a first clamping hydraulic cylinder, the second support is fixed with a second clamping hydraulic cylinder, a piston rod of the first clamping hydraulic cylinder is fixed with a first clamping block, and a piston rod of the second clamping hydraulic cylinder is fixed with a second clamping block.
Optionally, the side that first grip block and second grip block are used for contacting with end portion of the spindle is the arcuate surface matched with spindle.
Optionally, a piston rod of the loading hydraulic cylinder is connected with the distribution beam through a spherical hinge support to realize universal connection with the distribution beam.
Optionally, a magnetostrictive sensor is arranged between the distribution beam and the cylinder body end of the loading hydraulic cylinder to detect the extension distance of the piston rod of the loading hydraulic cylinder.
Optionally, the pivot includes first axle section, second axle section and establishes the sleeve between first axle section and second axle section, and the sleeve cover is in loading the cylinder body periphery of pneumatic cylinder and with loading the cylinder body fixed connection of pneumatic cylinder, first axle section and first reaction frame rotate to be connected, second axle section and second reaction frame rotate to be connected.
Optionally, the first reaction frame is fixed with first carrier bar, and first axle section is coaxial to pass first carrier bar, and first carrier bar both ends are rotated with first axle section through bearing assembly and are connected, and the second reaction frame is fixed with the second carrier bar, and the second axle section is coaxial to pass the second carrier bar, and second carrier bar both ends are rotated with the second axle section through bearing assembly and are connected.
Optionally, the first carrier beam both ends are equipped with the end cover and pass through end cover and first reaction frame fixed connection, and the second carrier beam both ends are equipped with the end cover and pass through end cover and second reaction frame fixed connection.
The beneficial effects of the invention are as follows:
1. According to the loading system disclosed by the invention, the angle adjusting mechanism is arranged on the outer side of the first counter-force frame, meanwhile, the clamping mechanism is arranged on the outer side of the second counter-force frame, the rotating shaft can be clamped by the clamping mechanism, the angle adjusting mechanism is not influenced by the first counter-force frame and the second counter-force frame in selection and installation, the angle adjusting mechanism with larger bearing capacity can be selected, meanwhile, the clamping mechanism is combined, the loading counter-force is jointly borne by the clamping mechanism and the locking force of the angle adjusting mechanism, the requirement of larger loading load is met, and the applicability of the whole loading system is improved.
2. Compared with the prior art that an electric push rod is adopted for distance adjustment, and then the hydraulic cylinder is adopted for loading, the loading system omits locking components such as a rigid wedge block, a fixed rod and the like, avoids the phenomenon of engagement locking under the working condition of larger load, and ensures the normal work of the loading system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view showing the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic view of the structure of embodiment 1 of the present invention in partial section;
FIG. 3 is a schematic diagram illustrating the cooperation of the loading assembly and the angle adjusting mechanism and the clamping mechanism according to embodiment 1 of the present invention;
FIG. 4 is an enlarged schematic view of a part of the interior of a loading cylinder according to embodiment 1 of the present invention;
FIG. 5 is a schematic cross-sectional view of FIG. 3 taken parallel to the first and second reaction frames in accordance with the present invention;
FIG. 6 is a schematic cross-sectional view of FIG. 3 taken perpendicular to the first and second reaction frames in accordance with the present invention;
FIG. 7 is a schematic view showing the arrangement of a magnetostrictive sensor according to embodiment 1 of the invention;
FIG. 8 is a schematic view of the angle adjusting mechanism according to embodiment 1 of the present invention;
FIG. 9 is a schematic view of a clamping mechanism according to embodiment 1 of the present invention;
The device comprises a first reaction frame, a loading assembly, a second reaction frame, an angle adjusting mechanism, a holding and clamping mechanism, a rotating shaft, a second bearing beam, a first bearing beam, a cover plate, a aligning bearing and a thrust bearing, wherein the first reaction frame, the loading assembly, the second reaction frame, the angle adjusting mechanism, the holding and clamping mechanism, the rotating shaft, the second bearing beam, the first bearing beam, the cover plate, the aligning bearing and the thrust bearing are arranged in sequence, and the aligning bearing is arranged in sequence;
2-1, a loading hydraulic cylinder, 2-2, a piston, 2-3, a piston rod, 2-4, a distribution beam, 2-5, a spherical hinge support and 2-6, a magnetostriction sensor;
4-1 of an angle adjusting hydraulic cylinder, 4-2 of a cylinder seat, 4-3 of a hinge shaft, 4-4 of a fixing seat, 4-5 of a hinge seat, 4-6 of a connecting rod, 4-7 of a fixing cylinder and 4-8 of an inclination angle sensor;
5-1, 5-2, 5-3, 5-4, 5-5, 5-6 and 5-6 of a first clamping hydraulic cylinder and a first clamping block;
6-1, 6-2, 6-3 and sleeve.
Detailed Description
Example 1
The embodiment provides a self-adaptive circumferential mechanical loading system, as shown in fig. 1-2, including a first reaction frame 1 and a second reaction frame 3, where the first reaction frame 1 and the second reaction frame 3 are arranged in parallel, the first reaction frame 1 and the second reaction frame 3 are both in an annular structure, and the bottom ends of the first reaction frame 1 and the second reaction frame 3 are fixed on a base.
The first reaction frame 1 and the second reaction frame 3 adopt hollow structures and are formed by welding steel members with the thickness of 2cm in a multi-section manner, so that the material consumption of the two reaction frames is reduced, the processing and manufacturing cost of equipment is reduced, and the structures of the rest structures and the base of the first reaction frame 1 and the second reaction frame 3 adopt the technical scheme disclosed in the patent CN113008685B and are not described in detail.
The reaction frame of the embodiment can realize self-balancing of the system when the model is loaded.
The space between the first reaction frame 1 and the second reaction frame 3 is provided with a plurality of groups of loading assemblies 2, and preferably, nine groups of loading assemblies 2 are arranged, so that the bearing requirements of tunnel models with different sections in any direction can be met. The first reaction frame 1 and the second reaction frame 3 are provided with nine loading hole sites for installing loading components.
Compared with the technical scheme disclosed in the patent CN113008685B, the embodiment improves the structure of the loading assembly.
As shown in fig. 3-7, the loading assembly 2 comprises a loading hydraulic cylinder 2-1, the loading hydraulic cylinder 2-1 is arranged between the first reaction frame 1 and the second reaction frame 3, the piston rod stroke of the loading hydraulic cylinder 2-1 is not less than 2 meters, and the loading requirement is met.
The loading hydraulic cylinder 2-1 is internally provided with a piston 2-2, and the piston 2-2 is connected with a piston rod 2-3.
The end of the piston rod of the loading hydraulic cylinder 2-1 is connected with a distribution beam 2-4 in a universal way, and the distribution beam 2-4 is used for contacting with the tunnel model and applying load to the tunnel model.
Preferably, the end part of the piston rod 2-3 of the loading hydraulic cylinder 2-1 is connected with the distribution beam 2-4 through a spherical hinge support 2-5 so as to realize universal connection with the distribution beam.
Compared with the connection of the distribution beam by adopting two hydraulic cylinders and the distribution beam described in the patent CN113008685B, the universal connection of the distribution beam and the loading hydraulic cylinder can adapt to the requirements of test pieces with different shapes.
In the embodiment, the loading hydraulic cylinder 2-1 is adopted to directly load the tunnel model, the position of the hydraulic cylinder is not required to be adjusted by the electric push rod first, then the hydraulic cylinder is utilized to load, the setting of a locking assembly is omitted, the equipment is simplified, locking assemblies such as a rigid wedge block and a fixed rod are omitted, the phenomenon of engagement locking under a larger load working condition is avoided, and the normal work of a loading system is ensured.
A magnetostrictive sensor 2-6 is arranged between the end part of the cylinder body of the loading hydraulic cylinder 2-1 and the distribution beam 2-4 to detect the extending distance of the piston rod 2-3 of the loading hydraulic cylinder 2-1, thereby controlling the loading load. The magnitude of the loading load can also be controlled by an oil pressure sensor mounted on the oil supply path of the loading cylinder 2-1.
The cylinder body of the loading hydraulic cylinder 2-1 is connected with a rotating shaft 6, and the rotating shaft 6 penetrates through the first counter-force frame 1 and the second counter-force frame 3 and is rotationally connected with the first counter-force frame 1 and the second counter-force frame 3 so as to realize the adjustment of the angle of the loading hydraulic cylinder 2-1.
The outer side surface of the first reaction frame 1 is provided with an angle adjusting mechanism 4, and the angle adjusting mechanism 4 is connected with the end part of the rotating shaft 6 extending to the outer side of the first reaction frame 1 so as to drive the rotating shaft 6 to rotate around the axis of the rotating shaft, so that the angle adjustment of the loading hydraulic cylinder 2-1 is realized.
The outer side surface of the second reaction frame 3 is provided with a clamping mechanism 5, and the clamping mechanism 5 is used for clamping the end part of the rotating shaft 6 extending to the outer side of the second reaction frame 3, so that the locking and fixing of the rotating shaft 6 are realized.
As shown in fig. 8, the angle adjusting mechanism 4 includes an angle adjusting hydraulic cylinder 4-1, a cylinder body of the angle adjusting hydraulic cylinder 4-1 is fixed on a cylinder seat 4-2, the cylinder seat 4-2 is rotatably connected with a fixed seat 4-4 through a hinge shaft 4-3, and the fixed seat 4-4 is fixed on the outer side surface of the first reaction frame through a plurality of bolts.
The end part of a piston rod of the angle adjusting hydraulic cylinder 4-1 is provided with a hinging seat 4-5 and is hinged with one end of a connecting rod 4-6 through the hinging seat 4-5 and a hinging shaft, the other end of the connecting rod 4-6 is provided with a fixed cylinder 4-7, and the fixed cylinder 4-7 is sleeved on a rotating shaft to extend out to the periphery of the end part of the first reaction frame and is fixedly connected with the rotating shaft.
The telescopic movement of the piston rod of the angle adjusting hydraulic cylinder 4-1 can drive the rotating shaft 6 to rotate around the axis of the rotating shaft through the connecting rod 4-6.
As shown in fig. 9, the holding mechanism 5 is fixed on the outer side surface of the second reaction frame 3, the holding mechanism 5 includes a first support 5-1 and a second support 5-2, the first support 5-1 and the second support 5-2 are oppositely disposed and disposed on two sides of the end portion of the rotating shaft 6 extending out of the outer side of the second reaction frame 3, that is, the first support 5-1 and the second support 5-2 are disposed at 180 ° intervals.
The first support 5-1 is fixed to the outer side surface of the second reaction frame 3 by a plurality of bolts, and the second support 5-2 is fixed to the outer side surface of the second reaction frame 3 by a plurality of bolts.
The first support 5-1 is fixedly connected with the end part of the cylinder body of the first clamping hydraulic cylinder 5-3, the end part of the piston rod of the first clamping hydraulic cylinder 5-3 is connected with the first clamping block 5-4, the second support 5-2 is fixedly connected with the end part of the cylinder body of the second clamping hydraulic cylinder 5-5, the end part of the piston rod of the second clamping hydraulic cylinder 5-5 is connected with the second clamping block 5-6, the first clamping hydraulic cylinder 5-3 and the second clamping hydraulic cylinder 5-5 are coaxially and oppositely arranged, the first clamping block 5-4 and the second clamping block 5-6 are used for clamping the end part of the rotating shaft extending out of the second counter-force frame 3, the first clamping hydraulic cylinder 5-3 and the second clamping hydraulic cylinder 5-5 can drive the first clamping block 5-4 and the second clamping block 5-6 to move oppositely or far away, and further the rotating shaft clamping state and the loosening state can be switched.
The opposite sides of the first clamping block 5-4 and the second clamping block 5-6, namely the sides for contacting with the rotating shaft 6, adopt arc-shaped surfaces matched with the rotating shaft 6, and are subjected to rough treatment to increase the friction force with the rotating shaft 6. The rotating shaft 6 is better locked and fixed.
The connecting rod 4-6 is provided with an inclination sensor 4-8 for detecting the rotation angle of the connecting rod, the inclination sensor is only required to adopt the existing single-shaft inclination sensor, when the inclination sensor detects that the rotation of the rotating shaft 6 reaches a set angle, the first clamping hydraulic cylinder 5-3 and the second clamping hydraulic cylinder 5-5 work, the rotating shaft is clamped by the first clamping block 5-4 and the second clamping block 5-6, and locking of the rotating shaft is achieved.
In this embodiment, the rotating shaft 6 includes a first shaft section 6-1 and a second shaft section 6-2 coaxially arranged, a sleeve 6-3 is arranged between the first shaft section 6-1 and the second shaft section 6-2, and the sleeve 6-3 is sleeved on the periphery of the cylinder body of the loading hydraulic cylinder 2-1 and fixedly connected with the cylinder body of the loading hydraulic cylinder 2-1 through a flange plate 2-7 and a plurality of bolts arranged at the end part of the cylinder body 2-1 of the loading hydraulic cylinder.
The first axle section 6-1 passes through the first reaction frame 1, a first bearing beam 8 is arranged inside the first reaction frame 1, the first bearing beam 8 is coaxially sleeved on the periphery of the first axle section 6-1, cover plates 9 are arranged at two ends of the first bearing beam 8, the cover plates 9 at two ends are respectively fixed with the inner side surface and the outer side surface of the first reaction frame 1 through bolts so as to realize the fixation of the first bearing beam 8, and stiffening plates are arranged between two ends of the first bearing beam 8 and the inner surface of the first reaction frame 1 so as to strengthen the structural strength of the whole first reaction frame 1.
The two ends of the first load beam 8 are rotatably connected to the first shaft section 6-1 by means of a bearing assembly comprising a self-aligning bearing 10 and a thrust bearing 11, wherein the self-aligning bearing 10 is located inside the thrust bearing 11.
The bearing assembly at the outer end part of the first bearing beam 8 is axially positioned by utilizing the fixed cylinder 4-7 sleeved on the outer periphery of the end part of the rotating shaft 6, and the bearing assembly at the inner end part of the first bearing beam 8 is axially positioned by utilizing the shaft shoulder structure arranged on the first shaft section 6-1.
The second shaft section 6-2 passes through the second reaction frame 3, a second bearing beam 7 is arranged inside the second reaction frame 3, the second bearing beam 7 is coaxially sleeved on the periphery of the second shaft section 6-2, cover plates 9 are arranged at two ends of the second bearing beam 7, the cover plates 9 at two ends are respectively fixed with the inner side surface and the outer side surface of the second reaction frame 3 through bolts so as to realize the fixation of the second bearing beam 7, and stiffening plates are arranged between two ends of the second bearing beam 7 and the inner surface of the second reaction frame 3 so as to strengthen the structural strength of the whole second reaction frame 3.
The two ends of the second carrier beam 7 are rotatably connected with the second carrier beam 7 by a bearing assembly, which comprises a self-aligning bearing 10 and a thrust bearing 11, wherein the self-aligning bearing 10 is located inside the thrust bearing 11.
The bearing assembly at the outer end part of the second bearing beam 7 is axially positioned by using a retainer ring sleeved at the end part of the rotating shaft 6, and the bearing assembly at the inner end part of the second bearing beam 7 is axially positioned by using a shaft shoulder structure arranged on the second shaft section 6-2.
The rotating shaft 6 can rotate, so that the angle of the loading hydraulic cylinder 2-1 can be adjusted, and the distribution beam 2-4 is in universal connection with the piston rod 2-3 of the loading hydraulic cylinder 2-1, so that the device is applicable to tunnel models with different section sizes and shapes.
The working method of the circumferential mechanical loading system of the embodiment is as follows:
The angle adjusting mechanism drives the rotating shaft 6 to rotate through the angle adjusting hydraulic cylinder 4-1 according to the angle requirement of the loading point of the test model, adjusts the angles of the loading hydraulic cylinder 2-1 and the distribution beam 2-4, realizes the adjustment meeting the requirements of various section forms such as circular, rectangular, elliptic, polygonal, horseshoe-shaped, double-circular combination and the like, and the first clamping hydraulic cylinder 5-3 and the second clamping hydraulic cylinder 5-5 work after the angle sensor detects that the angle meets the requirements to clamp the rotating shaft 6.
After the angle adjustment is completed, the loading hydraulic cylinder 2-1 works, the piston rod 2-3 of the loading hydraulic cylinder applies load to the tunnel model through the distribution beam 2-4, and the size of the load is controlled according to the magnetostrictive displacement sensor 2-6 or the oil pressure sensor.
According to the loading system, the angle adjusting hydraulic cylinder 4-1 is arranged on the outer side of the first counter-force frame 1, meanwhile, the clamping mechanism 5 is arranged on the outer side of the second counter-force frame 3, the rotating shaft 6 can be clamped by the clamping mechanism 5, the angle adjusting hydraulic cylinder 4-1 is not affected by the space between the first counter-force frame 1 and the second counter-force frame 3 in selection and installation, the angle adjusting hydraulic cylinder 4-1 with larger bearing capacity can be selected, meanwhile, the clamping mechanism 5 is combined, the loading counter-force is jointly borne by the clamping mechanism 5 and the locking force of the angle adjusting hydraulic cylinder 4-1, the requirement of larger loading load is met, and the applicability of the whole loading system is improved.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a self-adaptation circumferential force nature loading system, including first reaction frame and second reaction frame, first reaction frame and second reaction frame are cyclic annular and are equipped with a plurality of loading subassembly between, its characterized in that, loading subassembly is including loading the pneumatic cylinder, the cylinder body and the pivot of loading pneumatic cylinder are connected, the piston rod and the allocation Liang Moxiang of loading pneumatic cylinder are connected, pivot and first reaction frame and second reaction frame rotate and are connected, pivot one end stretches out to first reaction frame outside and is connected with the angle adjustment mechanism who installs at first reaction frame lateral surface, the lateral surface of second reaction frame is equipped with the other end of holding the clamp mechanism in order to centre gripping fixed pivot.
2. The adaptive circumferential force loading system of claim 1, wherein the angle adjustment mechanism comprises a connecting rod, the rotating shaft is fixed with one end of the connecting rod, the other end of the connecting rod is hinged with a piston rod of the angle adjustment hydraulic cylinder, the cylinder body of the angle adjustment hydraulic cylinder is hinged with a fixed seat, and the fixed seat is fixed on the outer side surface of the first reaction frame.
3. An adaptive hoop-force loading system as claimed in claim 2, wherein the connecting rod is provided with an angle sensor to detect the angle of rotation thereof.
4. The adaptive circumferential mechanical loading system of claim 1, wherein the clamping mechanism comprises a first support and a second support which are oppositely arranged, the first support and the second support are fixed on the outer side surface of the second reaction frame, the first support is fixed with a first clamping hydraulic cylinder, the second support is fixed with a second clamping hydraulic cylinder, a piston rod of the first clamping hydraulic cylinder is fixed with a first clamping block, and a piston rod of the second clamping hydraulic cylinder is fixed with a second clamping block.
5. The adaptive hoop-force loading system of claim 4, wherein the sides of the first clamping block and the second clamping block for contacting the end of the shaft are arcuate surfaces that match the shaft.
6. An adaptive hoop-force loading system as claimed in claim 1, wherein the piston rod of the loading cylinder is connected to the distribution beam via a ball pivot mount to achieve a universal connection to the distribution beam.
7. An adaptive hoop force loading system according to claim 1, wherein magnetostrictive sensors are provided between the distribution beam and the cylinder end of the loading cylinder to detect the extension distance of the loading cylinder piston rod.
8. The adaptive circumferential force loading system of claim 1, wherein the shaft comprises a first shaft section, a second shaft section, and a sleeve disposed between the first shaft section and the second shaft section, the sleeve being disposed around and fixedly coupled to the cylinder body of the loading cylinder, the first shaft section being rotatably coupled to the first reaction frame, and the second shaft section being rotatably coupled to the second reaction frame.
9. The adaptive hoop-force loading system of claim 1, wherein the first reaction frame is secured with a first load beam, the first shaft section is coaxially threaded through the first load beam, the first load beam is rotatably coupled to the first shaft section at both ends by bearing assemblies, the second reaction frame is secured with a second load beam, the second shaft section is coaxially threaded through the second load beam, and the second load beam is rotatably coupled to the second shaft section at both ends by bearing assemblies.
10. The adaptive hoop-force loading system of claim 9, wherein the first load beam has end caps at both ends and is fixedly coupled to the first reaction frame via the end caps, and wherein the second load beam has end caps at both ends and is fixedly coupled to the second reaction frame via the end caps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311829446.0A CN117907109B (en) | 2023-12-27 | 2023-12-27 | Self-adaptive circumferential mechanical loading system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311829446.0A CN117907109B (en) | 2023-12-27 | 2023-12-27 | Self-adaptive circumferential mechanical loading system |
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| CN117907109A true CN117907109A (en) | 2024-04-19 |
| CN117907109B CN117907109B (en) | 2024-10-22 |
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| CN202311829446.0A Active CN117907109B (en) | 2023-12-27 | 2023-12-27 | Self-adaptive circumferential mechanical loading system |
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| CN116124484A (en) * | 2022-12-27 | 2023-05-16 | 广西大学 | Loading test system and method for arch bridge model |
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| WO2023226582A1 (en) * | 2022-05-24 | 2023-11-30 | 深圳大学 | Circular shield tunnel lining structure deformation correction research test apparatus and test method |
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| WO2023226582A1 (en) * | 2022-05-24 | 2023-11-30 | 深圳大学 | Circular shield tunnel lining structure deformation correction research test apparatus and test method |
| CN116124484A (en) * | 2022-12-27 | 2023-05-16 | 广西大学 | Loading test system and method for arch bridge model |
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